Means and method of demagnetizing paper.



. w'finusea Hunk Rfiml q luvenhm F. R. CRAIG.

MEANS AND METHOD OF-DEMAGNETIZING PAPER. APPLICATION FILED JAN 9, 1908. RE

NEWED 001210, 1910. 993,034, Patented May 23, 1911 I h 2 fmc 6. Q2 2/v.

t which combines facility of operation with U N ITED STATES PATENT OFFICE.

OF ONE-HALF TO W. L. TOBEY, OF

HAMILTON, OHIO.

MEANS AND METHOD OF DEMAGNE'IIZING PAPER Specification of Letters Patent.

Patented May 23, 1911.

Application filed January 9, 1908, Serial No. 409,918. Renewed October 10, 1910. Serial No. 586,397.

To rz/l whom it may concern:

lie it known that l ll\'.\.\'l( R. CRAIG, a citizen of the l'uited States, residing at llatnilton, lintler county, Ohio, have invented a new and useful Improvement in Means and Methods of Demagnetizing laper. of which the following is a specification.

My invention relates to means for diseharging static charges. Sheets of paper become charged with static electricity by friction in their passage through a printing press or folder which causes them to adhere together and cause oti'set or smut when placed in contact with each other, this necessitates the interleaving of smut sheets or the drying of the sheets separately before placing them in a pile. The objects of my improvement are to subject each sheet of aper to the action of a predetermined quantity of heat during its discharge from the press or folder whereby the static electricity therein may be dissipated and the ink may be sntiiciently dried for the sheets to be laced in superposed positions without coming soiled by offset or smut; further objects are to provide automatic means for regulating the amount of heat; to rovide means for adjusting the burner to the width or to the lateral position of the pa er; to provide a pilot li ht for igniting the burner. and a mixer r economizing the gas, and to rovide a simple and durable device adapte to use on printing presses or elsewhere and eflicicncy of action. I

These objects are attained'in the following described manner as illustrated in the accompanying drawings, in which igure 1 is a plan with parts broken away of -a printing press provided with my improved device; Fig. 2 a side elevation: Fig. 3 a vertical section on the line aa of Fig. 1, and Fig. 4 a rear elevation of the burner and its connections.

In the drawings, 1 represents the supporting frame of a printing press, 2 the receiving table, 3 the' tracks, 4 the deliver carriage thereon, 5 and 6 the finger sha t to the tine-er shaft 5 and delivering fingers attached to the carriagc, 7 the automatic sh'eet stops, 8 the automatic stripper stops, 9 the carriage reciprocating mechanism, and 11 the delivery tapes, all being constructed and arranged in the ordinary manner. 4

The tubular burner 12 removably secured by means of clamps 13 is provided with a line of small perforations 14 in its rear face. It isrelosed at one end and provided at the other end with an ordinary gas and air mixer 15. A flexible tube 16 communicates with the mixer through a straight way cock I? from a supply of gas (not shown).

Stops i8 and 19 udjustably secured on the track near the respective ends of the stroke of the carriage thereon are arranged to com tart with the handle 20 of the cook 17 and respectively open and close said cock either partially or completely as desired. A pilot 21 preferably located near an intermediate point in the length of the burner communicates with the gas supply pipe at a point' beyond the cock 1?. Sleeves 22 rotatively mounted on the burner and preferably on its respective end portions are each formed with a collar 23 and 24 on its respe tive ends and with an intermediate longitudinal slot 25. Said slots are formed on one side in a line parallel with the axis of the burner and on the opposite shown in Fig. 4

In operation, the. carriage may be reciprocated on the track in a forward and rearward direction by means of the actuatin lever mechanism 9. When the carriage IS in its most forward position in,the direction of the arrows, thecontact of the handle 20 with the stop 19 closes the is delivered from the press and upon the lingers (l-with its rear edge in contact with the sheet stops 7 by means of the tapes 11. 'ljhe rearward movement handle 20 with stop 18 opens cook 17 and the burner is ignited by means of the pilot light.

In the forward movement of the carria e, the sheet stops 7 automatically release t a rear edge of the sheet 20 and the stri per stops 8 automatically engage with its ront edge whereby the forward movement of the sheet is prevented duringrthe forward move,

ment of the carri wit the ignited burner thereunder. In t is manner the sheets may heated during their delivery from the cnr' rings for dissipatin the static electricity therein. The heate or rarefied air under the s prevents themfrom immediate demagnetizes them contact with each other,

ink thereon; aniliinstantly and dries the cock 17 and the sheet- 26 eiently to prevent any oll'set or smut \vhen superposed in a pile together.

burner without entirely extinguishing it? When operated in this manner the pilot light may be dispensed with if desired. The sleeves may be rotatively adjusted on the burner for either completely or partially closing the perforations in either one or both end portions of the burner for the purpose of limiting the line of flame to the width of the sheet of paper and for exposing the llame more or less toward either end of the burner to register with the lateral position of the sheet during its discharge from the carriage.

Havin 1 fully described my improvement, what I c aim as my invention and desire to secure by Letters Patent of the United States is y 1. The combination of a reciprocating carriage, a burner carried thereby and provided with a cock and means for automatically actuating the cock during the movement of the carriage.

2. The combination of a carriage, a burner carried thereby and provided with a mixer, and with a cock for controlling the admission of gas to the mixer and means adjustably secured at a fixed point for intercepting and automatically actuating the cock.

3. The combination of a tubular burner rovided with a mixer, 11 valve controlled mlet thereto, means for reciprocating the burner laterally, and means for automati- (rally actuating the valve at a predetermined point in the movement of the burner.

The combination of a tubular burner, provided with a gas supply cock, means for reciprocating the burner laterally, aml with a stop mounted at a fixed point for actuating the cock at a predetermined point in the movement of the burner, edges in the line of a helix on a sleeve being rotatively adjustable on the burner for the purpose specified.

5; The combination of a carriage, a longitudinal burner mounted thereon, a cock tor controlling the admission of gas to the burner, adjustable stops mounted at fixed points for automatically actuating the cock and a pilot for lighting the burner.

(3. The combination of a carriage, u longitudinal burner mounted thereon and rovided with 3. Met light and with a gas cock, and adjustable stops arranged to automatically open and close the cock in respective predetermined positions of the carriage.

7. The combination of a. reciprocatin ca1' riage a longitudinal burner movable laterally therewith, and automatic means actuated by the movement of the carriage for controlling the admission of gas to the burner.

In testimony whereof witness my signature at Hamilton, Ohio, this 7th day of January, 1908.

FRANK R. CRAIG. In presence of- E. V. HILL, R. S. CARR. 

